The utility model discloses a flip cover with a safety piece, which comprises an upper cover and a lower cover, one side of the upper cover is hinged with one side of the lower cover, the lower cover is connected with an anti-theft ring, a plurality of disconnectable connecting points are arranged between the lower cover and the anti-theft ring, the upper cover is provided with an accommodating groove, and the accommodating groove is buckled with the safety piece. The safety piece comprises an upper piece buckled with the containing groove and a lower piece which is connected with the upper piece through a plurality of connecting ribs and extends out of the containing groove, the lower piece is provided with an elastic clamping tongue, the lower cover is provided with a limiting groove, the side wall of the limiting groove is provided with a limiting part, and when the upper cover covers the lower cover, the lower piece is inserted into the limiting groove, and the elastic clamping tongue is clamped with the limiting part; after the upper cover is turned over to break the connecting ribs, the upper piece is left in the containing groove, and the lower piece falls into the limiting groove. The anti-theft structure with the anti-theft ring and the safety piece is arranged, the anti-theft reliability is high, the sealing and dust-proof performance is good, and meanwhile the content can be prevented from being polluted.